Stitch-forming mechanism for sewing-machines.



W. N. PARKES.

STITCH FoIII-.IING MEGHANISII Foi: SEWING MACHINES.

MTLIUA'IIOU FILED TEB,7.1902.

1,1 19,865. Patented Dec. 8, 1914.

2 SHEETS-SHEET 1.

W. N. PARKES.

STITCH PORMING MEUHAMSM um SEWING MACHINES.

APPLlCAl'lOll 11H21) 'ILLLT H02` 1 ,1 1 9,865, Patented D00. 8. 1914.

2 SHEETS SHLL'I 2,

UNrrED sTAfrn-s PafrEN'i ormoni.

. i WILLIAM N. PABXES, OF BROOKLYN, NEW TQRK, ASSIGNOR T0 THE PARKES MACHINE COMPANY, OF NEJY YORK, N. Y., l. RPORATION OF NEW YORK.

STITCH-romaine MECPLANISM ron sEwINGMAcHrNEs.

Speccation of Ltters Patent.

Application filed Feb: uary 7, 1902. Serial No. 93,037.

T0 all whom -it may concern Be it .known that I, VILLIAM N. Pannes, citizen ofthe United States, and resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and usefulA Improvements in- Stitch- Forniing Mechanism for Sewing-Machines, of which tliefollowing is a specification.

This invention relates to the lock stitch class of sewing machines, which comprises a revolving bobhin case carrying looper, the loop engaging position of which is not changed laterally, and a reciproca-tin needle, the ,loop engaging position ofl whici is changed laterally.

In my n'xafxhino the hook or looper is revolved a plurality of times, or twice to each vertical thrust ot a lateral moving needle'.Y

for general use, and not therefore limited to specific use as are the machines .of ,this

.class in the priorart in which the said relative movements between 'the needle and the hook are used.

Generally speaking the object of my present invention is apart of a general object shown and described in my variouspatcnts,

namely the construction of 'an improved' stitch forming mechanism for use in the various machines I have invented, in which the loop engaging position of the needle is changed laterally. And it is-also an object of my invention to adapt a. stitch forming mechanism having the relative'movements mentioned between the needle and the hook, for 'use in other special and general stitching machines I have not shown in my presentapplication a feeding mechanism, but I have shown my invention located and adapted so a feeding or work moving mcchanismfmay be used in combination with it. And have shown such mechanism my present invention in my U. S. Patents NOS. 875,61camine-siamo and 875,623 issued to me. December 31, 1907. From these patents the important object of locating the revolvingt hook of my stitch forming mechanism below the needle or cloth plate. and

in use in combination with hack of the path of the needle will be ob- Patented Dec. 8, 1914.

vious, and applicant desires to ,emphasize this important feature of his invention.

By referring to U. S. Patents Nos. 875,024.5755326 and 375,628 issued to applicant December 31, 1907, a further important object of the relative location of parts mentioned will be understood. One 0f.'.the,in1'- portant functions secured by this relative location of parts, is, the adaptation of a stitch formiu mechanism, the hook of which is revo v-ed a'pluralit of times to each thrust of a laterally moving needle, for use rn machines 1n which it is necessary to,

have the hook located below the work 'and hack of the path of the needle, and this is one lof the. main characteristics of my present mventlon.

Referring to the drawings, Figure 1 is a front elevation of a machine embodying my invention, parts bein 'broken away, or

: partly in section,` to disclose details of the mechanism; Fig. 2 is a front end view, the

face plate being .removed tojd'iscl'ose-v the needle har operating mechanism and. parts of the machine being retrieved, or partly in section, to disclose details of construction; Fig. 3-`is a view of theneedle har showing the relative position of the parts in connection with the same when the needles are in one of their lateral positions; Fig. 4 is a view of the same when the needles are in the other of their'lateral positions; Fig. 5 is a side View of the said needle bar and operating parts in connection with the saine;

Fig. 6 is a detail showing parts ofthe connection between the segment lever F and the swinging arm which oscillates the needle har; Fig. 7 is a detaii partly insection of the same showing the construction thereof; and F ig. 8 is a detail viewof the cam part of collar 11. f

In the drawings, A represents the overhanging arm, B the bed late, C the presser bar, D the lower shaft, IE F the segment lever, and G a switch cam attached to the upper shaft E, which is adaptwhich are of a usual construction Yand are operated in a usual manner.

To the forward end of the shaft E is coinected disk 1 to which the crank pin 2 is suitahly attached, and on the said crank pin is pivoted the upper end of a link 3. A tuthe lupper shaft, i-.

ved to operate thesaid segment lever, all ofv bular needle bar 4 is suitably guided t0 be Q10 reciprocated and axially oscillated in the bearings 5 and G, and to the needle har aie attached cam parts or collars 7 and 8 which encircle the said needle bar, are adjustable thereon and secured thereto by means of screws 9 `and 10. l On the said cam parts or collars are formed respectively cam surfaces 14 and 15. l

The needle bar passes through a cam part or collar 11 having cam surfaces 12 and 13 formed thereon, which are adapted to engave respectively the said cam surfaces 15 an 1l, as shown in Figs. 2, 3, 4 and 5. On the cam part or collar l1 is formed a round extension or lug 11 which is located in a hole formed in the lower end of the aforoL said link- 3, the said end of the said link being extended laterally so as to form'al substantial bearing for the said lug 11'L of the collar 11, and the upper end of the said link 3 being also extended to form a. substantial bearing for the said crank pin 2, as shown in Fig. 5. These-cam surfaces serve to vary the thrust of the needle to compensate for the vertical movement of the needle during the time the beak of the looper is moving from a first to a second position of loop engagement, and thereby maintain vertically the relation between the eye of the needle and the beak of the looper, which permits a lateral movement of a. greater extent being given the needle. These cam surfaces are so constructed that when the needle is moved laterally in the same direction in which the-looper revolves the position of the needle is changed down- Wardl and vice versa when the needle is move in the opposite direction.

To the lower end of the needle bar 4 is suitably secured a needle clamp 19 in which the needles 20 and 21 are clamped by means of clamping screws 22 and 23. On the said clamp is formed a projection 24 through which holes 25 and 26 are formed to lead the thread to the needles. The needles 20 and 21. are provided with the usual thread eyes 20* and 21* which run through the needle at right angles to the direction in which they are moved laterally. It is obvious, of course, that one of these needles may be omitted from themachine when the work of only one needle is desired.

To the needle bar 4 is attached, by means of a set screw 16, an arml 17 which has a vertically extending rod 18 secured to it, as shown in Fig. 2. A bearing 27 is attached to the forward end of the arm A of the machine. as shown in Figs. 1 and 2. On the said bearings is pivoted an arm or lever 28 having a downwardly extending part 29 through which is formed a vertical bore in which the upwardly extending rod 1S is adapted to reciprocate. A collar 30 suitably connected to the upper end of the begging 27 serves as a means for retaining. the arm chine. Y

28 on the said bearing. By means of a ball C joint connection, one end of a link 31 is connected to the part 29 of the arm 28. The other end of the said link passes through an enlarged end 33 of a. threaded 7a bolt 32. The said bolt 32 passes through one end of a connecting part 35, a socket being formed in the said connecting pari! 35 for the recept n of the said enlarged end 33. A channel is formed longitudiinall?` Y in the said connecting part 35 for iocatin and guiding the end of the rod-3l inthe said part. The outer end of the holt 32 threaded and on the same is located a thurnlw nut 32* which, in combination with the parte just described, serves as a means for ad justably clamping the rod 31 to the partA 35. The free end of the connecting part 35 is in a usual way adjustably connected in a way 37 formed in the oscillating segment 35 lever F, which latter is of the usual con.- struction, suitably pivoted in the usual bearing and oscillated by usual means from the movement of a usual switch cam 38 which is secured on the upper shaft E of the ma- Itwill .now be understood that when the machine is in operation the segment leverv F is oscillated, and that through the connecs Y* tions between it and the needlebar, the nee. an j dle bar is oscillated on its vertical axis, the extent of this oscillation being' determined by the adjustment of the end of the part 35 toward or from the pivot of the oscillating Y lever F. As the needles carried by the d@ needle bar are located eccentrically relative to the axis of the bar, when the 'needle bar is oscill'atedthe needles are moved laterallyin a. path concentric with the axis about which the needle bar oscillates. If it is not ica desired to move the needle laterally, the end of the connection 35 may be adjusted over. the axis of the oscillating lever F which, as is well known, in connection with machines in which such levers are used, prevents any. 1:19

movement being transmitted from it to the needle or needles. Under this adjustment it will be understood that the stitch forming mechanism is adapted to do plain straight away stitching, or in other words to make 11i; plain stitches in contradistinction to zigzag stitches. Y The looper mechanism comprises a looper 39 provided with a beak 40, by means of which the loop of needle thread is engaged and passed around a bobbin' case containing a mass of locking thread. A gear 40 is connected with the hook '39 and a second gear 41, which is carried by the under shaft D, is in engagement with 'gear 125 The gear 41 is twice the diameter of the" gear 40, sgitwill' be understood that, .in the operation of the machine, the gear 41* and 'the loope r 39 are revolved twice to each revolution of the gear 41. And as said gear annees 41 is secured on the' shaft D and said shaft revolves, as is usual, once to each revolution of the needle operating shaft E, it will be understood that the looper revolves twice to each reciprocation of the needle.

The location of the looper 39 is such that its Vertical axis is coincident with the vertical axis of the needle bar, and the needles ivarried by the needle holder, are located in nt ot". the hook so that they reciprocate t outside of the ath of the healr of the ier so it will be understood that when the needle bar is oscillated the needle or -ieedles carried by it are also oscillated laterally in a path that is concentric with the said vertical axis of the looper.

A needle plate b' provided with a needle slot or passage b2 serves as a rest for the Work and to separate it from the comple mental stitch forming mechanism parts that are located below the needle plate, and the passage b2 permits the. needle to pass through the Work and the needle plate and cooperate With the rotary hook mechanism which is located below it as has been described.

By properly timing the needle clamp and th looper, the needle or needles can be operated in any part of a circle around the axis on which theloop taker turns. This construction and arrangement of parts permits of the machine being very readily changed from a right to a left handed machine or vice versa or in the Work being moved in any direction and the stitch-forming mechanism being adjusted so that the needles will move laterally at right angles to the movement of the said Work or in any direction laterally with respect to the movement of the work. The securing of these and other valuable functions, before mentioned, is made possible hy the construction and relative relation of the parte of my im'- \,rov-.i stitrlrtorming mechanism, and the idurality movement of the looper in the same.

Having non' described a preferred form of my invention. what l claim neav is:

l. yA sewing machine comprising a vcrtit-ally reciprocating needle, a looper adapted to cooperate with said needle. means for moving the needle laterally relative to the "impera and means comprising a cam adapted to vari the depth of thriist of said needle vertically and thereby maintain the vertical relation between the eve of the needle and the hea k of the hook.

2. ln combination in. a sawing machine. a stitch forming mechanism comprising a ,iprocating nccdlediar or holder mounted in iixel be;` ings and adapted 'to turn therein on its vertical axis. means whereby when the said nccdlebar is turned on its vertical axis the reciprocating position of the needle is change-rl vertically' and means for turning the said needle-bar on its vertical axis.

3. In a sewing machine, a stitch forming mechanism comprising a reciprocating needle-bar mounted and adapted to turn on its vertical axis, a needle carried by the said needle-bar and eccentrically with respect to the vertical axis of the same, means whereby when the said needle-bar is turned on its vertical axis the reciprocating position of. the needle is changed vertically, means tor turning the said needle-bar on its vertical v5 axis, and a looper operated to coact with the said needle.

Al. in a sewing machine, a. stitch forming mechanism comprising a needle. means for reciprocating the said needle7 means for swinging the said needle laterally.I a cam op erated by and during the movement of the means for laterally moving the needle. means intermediate the s d needle and the`A cam whereby the reciprocating; position ol' the needle is changed t'i-ntically. and a. conr plelnental stitch forming; nuechanism adapt ed to comet with. the said needle.

5. In a sewiz'tg-machinev` a stitch-formatie mechanism comprising a rccimormtng neeso lieber adapted to be oscillated on, its vertiv cal axis, means for oscillating the said neidle-bar comprising an arm attached to same, a lever '38 suitably pivoted to be o cillad, a rod 18 attached to the said ar and adapted to reciprocate in the said leveny and means for oscillatix'ig the lever.

6. A sewingmachine comprisingr a nee die-plate, a ver icaily reciprocating nf located above said needle-plate, a icone-r no cated below said needle-plate, n'ieans lor r volving said looper a plurality' of time each thrust of said needle, and :nei/uriV moving the needle laterally relative to looper and in a path that concentric with the axis ot' the looper.

'7. ln combination in a self i needle-bar, a needle carried for reciprocating the said nev` swinging the said needle iat concentric with the vertical. a. rile-bar. a. f omplemcn'tal mechanism comprising a inn. f be rotated the axis ot the liar :irai ing coincident. and means tra' wir said hooi; a plurality of limes with :e to a reciprraatiug move :ent oif the i 9. in comhinatioi'i in a, seeing ma. needlel i a nec-'tie mrifctl tl for reciprocating the sail ne swinging the seul needle lai; that convenir-ie with the vertical the needleflmr, a fomgilcinusital ing mechanism comprising a to be rotated the axis o? the being coincident and means if? the said hook a plurality of times with respect to a reciprocating and lateral nuire ment of the needle,

9. A stitch-forming mechanism compris w in.. l...

Navi,

ing a reciprocating and vibratingvneedlebar, means for reciprocating said bar, and means for vibrating said bar, including a rod connected to the bar, and a lever having a tubular portion in which said rod reciprocates and afulcruin that is coincident with the longitudinal axis of the needle-bar.

l0. A stitch-forming mechanism comprisingr a reciprocating 'and vibrating needlebar, and mechanism for actuating said bar including means for shifting the vertical working position of the bar during the vibrations thereof said means including a cam which is attached to the bar, and a part adapted to engage with said cam.

l1. A stitch-forming mechanism comprising a reciprocating and vibrating needlebai', and mechanism for actuating said bar including means for shifting the vertical working position of the bar during the vibrations thereof, said means including a cam `which is carried by the needle-bar, a second cam in engagement with said first cam by means of which the bar isreciprocated, and its reciprocating position changed when the bar is turned on its longitudinal axis.

l2. A sewing machine having a vertically nation with means whereby the vertical working position of the needle is either raised or lowered accordingly as the lateral position of the needle is changed from one to the other side of the first cooperative poni sition. y

13. A sewing machine comprisin a looper which revolves in a horizontal p ane a needle adapted to reciprocate in the line oil' feed in front of said looper, means for reciprocating said needle once to a plurality of rotations of said looper, and means for oscillating said needle laterally in a path substantially parallel to the periphery of the looper.

Signed at New York in the York and State of New of Feb. A. D. 1902.

WILLIAM N. PARKES.

county of New York this 6th day Witnesses:

A. A. NEWBERY, GUsTAv SCHONHEIT. 

